As of October 27, 2026, VWO is used by 37,709 websites in the TechLeads index: 23.0% of all A/B Testing detections, the 2nd most-used of 34 A/B Testing technologies.
Websites using each technology in the TechLeads index, and its share of all A/B Testing detections.
| # | Technology | Websites | Share |
|---|---|---|---|
| 1 | Google Optimize | 52,621 | 32.1% |
| 2 | VWO | 37,709 | 23.0% |
| 3 | Convert | 16,367 | 10.0% |
| 4 | AB Tasty | 11,006 | 6.7% |
| 5 | Adobe Target Standard | 8,624 | 5.3% |
| 6 | Decibel | 8,564 | 5.2% |
| 7 | Estore Compare | 6,168 | 3.8% |
| 8 | Intelligems | 6,137 | 3.7% |
| 9 | Adobe Target | 4,606 | 2.8% |
| 10 | Kameleoon | 4,415 | 2.7% |
| 11 | Dynamic Yield | 2,186 | 1.3% |
| 12 | Omniconvert | 1,315 | 0.80% |
Rows link to each competitor's market share page where one exists. The table lists the 12 most-used technologies; ranks are by website count.
In HTTP Archive's monthly crawl of public websites, VWO was detected on 93,780 pages in September 2026, down 15.4% from a year earlier (peak: 113,738). Among the 1,000 most-visited sites, it appeared on 30. HTTP Archive is a separate dataset from the TechLeads index, so its numbers are not added to ours.
Same month, other Analytics technologies in HTTP Archive: Google Analytics 26,446,274, Facebook Pixel 8,201,867, Cloudflare Browser Insights 6,081,428, Site Kit 3,624,668, Microsoft Clarity 2,814,686.
Based on country-code domains (such as .de or .co.uk); websites on .com and other generic domains are not assigned a country.
See all 37,709 websites using VWO or download the full list as a CSV for $29.
TechLeads scans public websites and detects VWO from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is VWO's website count divided by the website counts of all A/B Testing technologies we track; a site using two A/B Testing tools counts for both. Counts were last refreshed on October 27, 2026 and update daily.
VWO accounts for 23.0% of A/B Testing detections in the TechLeads index (37,709 websites), which makes it the 2nd most-used of 34 A/B Testing technologies we track.
TechLeads currently detects VWO on 37,709 websites. HTTP Archive's monthly crawl, a separate dataset, detected it on 93,780 pages in September 2026.
By number of websites, the largest A/B Testing technologies besides VWO are Google Optimize (52,621), Convert (16,367), AB Tasty (11,006), Adobe Target Standard (8,624), Decibel (8,564).
Websites using VWO include carsensor.net, merriam-webster.com, rightmove.co.uk, upwork.com, dailymail.co.uk, unbounce.com. The full list of 37,709 websites can be exported as a CSV for $29.
